British Transport Police is appealing for information after a member of station staff was assaulted on board a train at Southend Victoria station.
Investigators have released CCTV of a man they would like to speak to in connection with the incident, which took place on Monday, 25 March.
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Saturday's weather for the east with Philippa
Saturday's weather for the west with Philippa
Memorial events are taking place in tribute to the victims of the Shoreham air crash.